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HD 4.50BTNC/HD 4.50R
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Important safety instructions
Intended use/Liability
These wireless headphones are designed for use with mobile devices (e.g. mo-
bile music players, mobile phones, tablets) that support wireless communication
via
Bluetooth
. Compatible
Bluetooth
devices include those that support the fol-
lowing profiles: Hands Free Profile (HFP), Headset Profile (HSP), Advanced Audio
Distribution Profile (A2DP), and Audio/Video Remote Control Profile (AVRCP).
It is considered improper use when this product is used for any application not
named in the associated instruction manuals and product guides.
Sennheiser does not accept liability for damage arising from abuse or misuse of
this product and its attachments/accessories.
Safety instructions for the Lithium-Polymer battery pack
WARNING
In extreme cases, abuse or misuse of the Lithium-Polymer battery pack can lead
to:
• explosion
• fire development
• heat generation or
• smoke or gas development
Dispose of products with built-in rechargeable batteries at special
collection points or return them to your specialist dealer.
Only use rechargeable batteries and chargers recommended by
Sennheiser.
Charge products with built-in rechargeable batteries at ambient
temperatures between 10 and 40°C/50 and 104°F .
Switch battery-powered products off after use.
When not using the product for extended periods of time, charge its
built-in rechargeable batteries regularly (about every 3 months).
Do not heat above 70°C/158°F, e.g. do not expose to sunlight or
throw into fire.
Do not charge a product with built-in rechargeable batteries if the
product is obviously defective.